Photographic phonograph



F. W. ADSIT.

PHOTOGRAPHIC PHONOGRAPH.

APPLICATION FILED FEB. 25. 1918.

1,338,71 9; atented May 4, 1920.

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FRANK w. msrr. 01? em. PAUL, MINNESQTA.

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To all whom it may concern:

Be it known that I, FRANK W, Ansrr, a.

citizen of the United States, and a resident of St. Paul, in the county of Ramsey and; State of Minnesota, have invented certaln new and useful Improvements in Photographic Phonographs in is a specification.

lhis application is a divisionof my copending application Serial No. 135,265, filed Dec. 4, 1916, entitled .Photographic phonographs. 4 i

, of which the-follows One object of invention is to provide means for registering on a film graphic representations of sound waves. 4

-Another object of m invention is to provide means for registering on a filmgraphic representations of sound waves n such a manner asto have. thegraphlc representationsclearly defined and of as great amph the film will-depend upon the position occutude as possible.

Another object of my invention isto pro vide means in connection with a sensitized film such that light reflected from a mirror may be registered "on a film on one side of the center line thereof when the reflecting mirror moves in one direction from its normal position, and on the other side of its;

center line. of the film' when the mirror moves' to the otherv side of its normal vposition. I

With these and incidental objects in' view,

' the invention consists of certain novel feaview of myrecording means. Fig. 2 is a r 7 negative film producedby my recording means. Fig. 3 is a positive film produced from the negative shown in Fig,. 2, and

- ,Fig; 54 is a schematic representation of my' film winding means. I I The dia hragm'l, Fig. '1, mountedin the horn 2, o ordinary construction, carries a nk?) to which is hinged .a double angle- .mirror having faces 4 and 5-, V

A source of light 6 projects light rays therefrom, which passes'through the lenses 7 and Sand are-'prOJected b the; mirrors 9 and 10, respectively, throng stops 11 and '12 onto the mirror faces 5 and 4, respectively.

' Specification ofietten Ifatent.

Original application filed-December 4, 1916 Serial No. 185,285.- Divided and this application 1 25, 1918. Serial No.;819,150.

Patenteday 4, 1920."-

jll ed February The light rays-from. the mirrors 4 and 5 I are normally cut off from the film 13 by the stop 14, but it is a parent that if the diaphragm 1 isflmove downwardly, the mirrors 4 and 5 will be turned angularly about their common support 15' and a certain amount of light will be projected from the mirror 5 onto the film '13, butno light from themirror 4 will reachthe film 13; also if the diaphragm is moved upwardly part of the light of the mirror 4 will fall;on the film 13,, w ilenone of the light from the mirror 5 will reach the film, in each case the light th' stop 14. I

- t is evident thereforev that if the diaphragm 1 vibrates, as under the influence of a voice or musical tone, a certain amount of light will be projected on the film 13, and the position and amount of light received on pied by the diaphragm 1- at any particular.

instant, the result being a film similar to that shown in Fig. 2, and a positive from that negative would be similar to that shownin Fig. 3.1 A

The film would preferably wind from a spool 16, Fig. 4, by any suitable rollers 17.

and '18, onto a spool 19, run at suitable.

speed.

It vis evident that with a positive similar to the one shown in Fig. 3, passed through a suitable reproducing means, the original sound wave could be produced, but as tliis is part of my copending application, the

reproducing means willv not be described or illustrated herein, as this application claims only the film and means for producingthe same.

While I have described my invention and illustrated it in one particular design, I do not wish it understood that I limit my the; application Vof the invention may be {varied in many ways within the scope o; the

and stationary means for preventing light thrown on both sides of said center. I line at the samejnstant,

being self to this construction, as .itis evident that combination of-a sensitized film, a source 0 light, means controlled by sound vibrations whereby light in'ay be thrown on one side 6 or the other side o fthe center line of said 'film, producingthereon a record, and' sta' tionary' means comprising a stop f0 venting said center line at the same instant.

1o" 3. In' a 'photog'raphic phonograp r pre-- light being thrown on both sides of combination of a sensitized filin, 'af source of light, means for projecting the li ht rays from said source of light onto said him, said means including a double mirror hinged and controllable by-sound vibrations, astop for 15 preventing light from one half of said double mirror from bein thrown on beyond the center line of sai film.

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- FRANK W; AD-SIT- 

